Get started with Bash, Unix pipes, directory navigation, sudo, Nano, and other command-line essentials ...

Find the oldest file The printf option of the find command allows you to do some more specific searches than you might have been doing in the past. In the command below, for example, we are ...

Under UNIX, you can use the FILENAME statement to assign filerefs not only to external files and I/O devices, but also to a pipe. Pipes enable your SAS application to receive input from any UNIX ...

Cron is nice and all, but don't forget about its cousin at. When I first started using Linux, it was like being tossed into the deep end of the UNIX pool. You were expected to use the command line ...

In the age before tab-completion, having a long command, much less a hyphenated command, was something to avoid. That's why we call it "tar" not "tape-archive" and "cp" instead of "copy." I like to ...

Since Unix was a multiuser system from the very beginnings, being a sysadmin meant executing a lot of commands as a superuser.

Matisse.net hosts a list of Unix commands unique to Mac OS X/Darwin. You'll find a lot of good stuff in that list that you might not have been aware of. For example, CpMac allows you to copy a ...